Shoemaking



Dec. 10, 1940.

I P. BRAUNER SHOEMAKING Filed July 12, 1938 3 Sheets-Sheet 1 My .2 1 m T w m/a a 5 q I ww I f 4 F F m 7 w F M\JW Dec. 10, 1940. BRAUNER 2 224,213

SHOEMAKING Filed July 12, 1938 s Sheets-Sheet 2 Dec. 10, 1940. R B UNER 7 SHOEMAKING Filed July 12, 1938 a Sheets-Sheet s if Figlfi r\\ I N Y//// /1//] Patented Dec. 10, 1940 (PATENT OFFICE SHOEMAKING Pincus Brauner, Haverhill, Mass., assignor to United Shoe Machinery Corporation, Borough of Flemington, N. J a corporation of New Jersey Application .iulyiz, 1938, Serial No. 218,739

4 Claims.

This invention relates to improvements in the manufacture of shoes havin complemental interfitting inner and outer soles.

In a copending application, Serial No. 16,361,

5 filed April 15, 1935, in the name of Karl Kilburn, there is disclosed a method of shoemaking which involves the splitting of a sole blank into an insole having a central forepart recess in the side which is to face the outsole of a shoe and an outsole having at the side which is toiace the insole a central forepart projection that is complemental to the insole recess and the assembly of the insole and the outsole during the process of making the shoe with the complemental portions of the soles in interfitting relation.

One object of the present invention is to provide an improved method of making shoes the inner and outer soles ofwhich have complemental interfltting portions of the character referred to, the practice of which will result in the making of substantial savings in the cost of the materials employed and in the shoemaking operations involved.

With this object inviewkmy invention ,consists in the improvements in shoemaking hereinafter described and claimed.

The invention will be explained with reference to the accompanying drawings, in which Fig. l is a View in cross-section of the forepart of a sole blank which is to be divided intoa skeleton insole member and a complemental outsole member;

Fig. 2 is a view in crosssection of the foreparts of a skeleton insole member and a complemental outsole produced from a blank such as that shown in Fig. 1;

Fig. 3 is a plan view of a sheet of insole material having secured to one side thereof a plurality of skeleton insole members like the insole member shown in Fig. 2;

Fig. 4. is a cross-sectional view of a die and a cutting block illustrating the operation of cutting laminated insoles from the sheet and insole member assembly shown in Fig. 3;

Fig. 5 is a perspective view of a completed sole; v

Fig. 6 is a perspective view of a completed outsole;

Fig. 7 is a fragmentary cross-sectionalview of a shoe in process of manufacture, the shoe having embodied therein a laminated insole such as that shownin Fig. 5; 1

Fig. 8 is a view similar to Fig. 7 but showing the shoe as it appears after the outsole has been applied; i j

Figs. 9 and 10 are views similar to Figs. 7 and 8 but illustrating an alternative arrangement of the insole in the shoe; 1 i

Fig. 11 is a longitudinal sectional view of a die and. a cutting block illustrating an alternative method of forming the skeleton insole member;

. Fig. 12 is a cross-sectional View of a die and a cutting block illustrating the operation of cutting out a laminated insole comprising as one of its elements a skeleton insole member formed by a die-cutting operation such as that illustrated by Fig; 11;

Fig. 13 is a perspective View of a completed insole shown in process of manufacture in Fig. 12;

Fig. 14 is a section on the line XIV-XIV of Fig. 13;

Fig. 15 is a perspective view of an outsole for use-with the insole shown in Fig. 13;

Fig. 16 is a section on the line XVIXVI of r Fig. 15;

Fig. 17 is a. cross-sectional view of a die of special construction which may be used for the purpose of forming a beveled edge upon a memher which is to be cemented to an outsole to form a forepart projection thereon;

Fig. 18 is a fragmentary cross-sectional view of a shoe in process. of manufacture, the shoe embodying an insole such as that shown in Fig. 13, and a complemental outsole such as that shown in Fig. 15; and

Fig.19 is a View similar to Fig. 18 illustrating an alternative arrangement 0f the insole in the shoe.

In practicing my invention, as illustrated in Figs. 1 to 10, inclusive, I divide each of a plurality of unitary sole blanks oi outsole size and shape, such as the blank B (Fig.- 1), into a skeleton insole member 20 and a complemental outsole 22 (Fig. 2) the insole 20 having a" central forepart opening 24 defined, by a iorepart rand portion having a beveled inner'edge, 26 and the outsole 22 having a central forepart projection or island 28 which is complemental to the opening 24, the outsole projection 28 havingits marginal portion beveled to correspond to the beveled edge of the rand portion of the insole. The dividing operation may be performed upon each sole blank by splitting it in a plane parallel to its surfaces in its heel and shank portions and along the margin of its ball portion while splitting obliquely around its central ball portion, as indicated by the line XX (Fig. 1). Conveniently,.the splitting may be accomplished by the use of, a matrix roll type splitting machine, such.

as that disclosed in United States Letters Patent No. 2,088,745, granted August 3, 1937, upon application of C. E. Hood, such a machine having a straight-edged splitting knife against which the sole blank is fed edgewise by means of cooperating matrix rolls which temporarily deform or distort the blank by depressing its central ball portion so that the knife will emerge around the periphery of the depressed portion of the blank.

Having provided a plurality of skeleton insole members 20, as above described, I coat one side of each member with cement, such as latex, and lay a plurality of the members, coated sides down, upon a sheet 34 of insole material (Fig. 3), the members 20 being arranged in the closely adjacent edge-to-edge relationillustrated and being pressed against the sheet 34, for example, by passing the sheet with the insole members upon it between pressure rolls so as firmly to secure the insole members to the sheet. The sheet 34, with the insole members thereon, is then laid upon a cutting block 36 (Fig. 4) and an insole-shaped die 38 is positioned upon one of the insole members 2!] with the cutting edge of the die positioned just inside the edge of the oversized insole member, as indicated by the dotted line 40, and the die is forced through the insole member and through the sheet 34,- thus cutting out a laminated insole comprising two full length layers, one having an opening extending through its forepart and the other having an imperforate forepart bridging the opening in the perforate layer. The die 38 is then similarly placed upon the other insole members 20, in succession, and operated so as ultimately to form as many laminated insoles as there are insole members upon the sheet 34. The laminated insoles thus produced will appear as shown in Fig; 5, each having a recess 44 which extends only part way through its forepart and which is complemental to the forepart projections- 28 upon the outsoles 22.

In using an insole 42 and a complemental outsole 22 in'the manufacture of a shoe, the insole is placed upon the bottom of a last 46 with the apertured layer of the insole next to the last, as in Figs. 7 and 8, or, alternatively, with the unapertured layer next to the last, as in Figs. 9 and 10, and an upper 48 is placed over the last and the marginal portion of the upper secured by cement or otherwise in overlasted position upon the outer layer ofthe insole and an outsole'22 is then laid upon the bottom. If, as herein illustrated, the outsole is to be cement attached, the margins of the upper are then roughened and coated with cement which is allowed to dry. After a quantity of shoes have been prepared in this manner and a corresponding number of outsoles 22 have had their margins roughened and precemented in the usual way, solvent is applied to an outsole and the outsole is assembled with a shoe in a sole attaching press, in which the shoe is allowed to remain until the softened cement has become set so as permanently to attach the outsole to the shoe. If the insole has been laid on the last in the position shown by Figs. 7 and 8, the sole attaching pressure will cause the outsole projection28 to distort the central ball portion of the insole so that a recess will be formed in the outer side of the insole forepart to receivethe outsole projection. If, however, the insole has been positioned upon the last as indicated in Figs. 9 and 10, the outsole projection willfit within and fill the insole recess without distorting the insole.

As indicated in Fig. 11, somewhat oversized insole members may be cut from a sheet 48 of insole material by means of a die 50 cooperating with a cutting block 52, the die being shaped to impart the desired edge contour to the insole member and, in addition, to cut an opening in the central ball portion thereof. The central portions cut from the insole members by this die are preserved for use in forming the projections or islands on the outsoles, as will hereinafter appear. The died-out insole members are then laid upon a layer of insole material, preferably in the form of a large sheet, similar to the sheet shown in Fig. 3, the insole members being positioned upon the sheet and secured thereto by cement, as already described in connection with the insole members 20. The sheet, a portion of which is shown at 54 in Fig. 12, is then placed upon a cutting block 52, and a die 56 of insole size and shape is placed upon one of the insole members and forced through both the insole member and the sheet 54. In a similar manner, the die 56 is thereafter successively positioned upon the other insole members upon the sheet 54 and operated to produce a plurality of laminated insoles, such as the insole 58 (Fig. 13), each insole comprising a skeleton or apertured layer Ell'and an unapertured layer 62 and each having a recess 64 extending part way through its forepart. A plurality of outsoles B6 are also formed by die-cutting or rounding operations and one of the pieces cut from the insole members is cemented to the central forward portion of each outsole, thus forming upon the outsole a central forepart projection 68 complemental to the insole recess 64. If it is desired to form upon the outsole a projection of a thickness differing from that of the insole layer 60, the projection may be died out from a separate piece of sheet material of the desired thickness. The location of the projection 68 upon the forepart of the outsole may be determined by the use ofsuitable gaging devices or with reference to a mark previously applied to the outsole. Advantageously, the die used for forming the cut-out portions which are to constitute the outsole projections may be formed, as shown in Fig, 1'7, with a beveled shoulder 10 shaped and arranged to form by compression upon the cut-out portion 12 a beveled or blunted edge. The cut-out portions are secured to the outsoles with the beveled edges 14 uppermost, as shown in Figs. 15 and 16, so

that when an outsole is applied to the shoe the beveled edge on the outsole projection will facilitate the entrance of the projection into the recess in the insole.

In using the insole 58 in the manufacture of a shoe the insole may be placed upon the bottom of a last 46 with the unapertured layer 62 next to the last, as shown in Fig. 19, in which case the outsole is applied with its central forepart projection 68 interfitting Within the recess in the insole. Alternatively, the insole may be applied to the bottom of the last with the apertured layer 60 of the insole next to the last, as shown in Fig. 18, in which case the sole attaching pressure will cause the outsole projection 68 to deflect inwardly the unapertured layer 62 of the insole, as shown in Fig. 18, causing the central ball portion of the layer 62 to fill the forepart opening in the apertured layer 60 and thereby forming a recess in the layer 62 which is filled by the outsole projection 68.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. That improvement in the method of making soles which consists in dieing out the central forward portions of a plurality of insole members, cementing the died-out members to an imperforate layer of insole material, cutting said insole members inwardly of their edges and through said imperforate layer by means of an insole shaped die thereby providing a plurality of laminated insoles each having a forepart recess extending only part way therethrough, and

cementing the portions cut from said insole members to a plurality of outsoles thereby providing upon said outsoles forepart projections complemental to the recess in said insoles.

2. That improvement in methods of making soles which consists in dieing out the central forward portions of a plurality of insole members thereby forming a plurality of skeleton insole members each having a central forepart opening defined by a perpendicular shoulder and, simultaneously with said dieing operations, compressing the margins of said central forward portions, and thereby forming beveled edge faces at one side of each of said portions, arranging said skeleton insole members in closely adjacent edge-to-edge relation upon one side of an imperforate sheet of insole material and securing said members to said sheet, cutting through said insole members inwardly of their edges and through said sheet by means of an insole-shaped die thereby providing a plurality of laminated insoles each having a forepart recess extending only part way therethrough, and securing the unbeveled sides of the portions died out from said insole members to the central forward portions of a plurality of outsoles thereby providing upon each of said outsoles a forepart projection substantially complemental to said insole recesses but having an exposed beveled edge face for facilitating the fitting of said projection within the forepart recess of one of said insoles in the manufacture of a shoe embodying said insole and said outsole.

3. That improvement in shoemaking which consists in dieing out the central forward portion of an insole member thereby forming a skeleton insole having a central forepart opening defined by a perpendicular shoulder and, simultaneously with said dieing operation, compressing the margins of said central forward portion and thereby forming a beveled edge face at one side of said portion, securing the unbeveled side of the portion died out from said insole member to the central forward portion of an outsole thereby providing upon said outsole a forepart projection substantially complemental to said insole opening but having an exposed beveled edge face for facilitating the fitting of said projection within the forepart recess of said insole, and assembling said insole together with said outsole in the manufacture of a shoe with said substantially complemental portions of said soles in interfitting relation.

4. That improvement in shoemaking which consists in dieing out the central forward portion of an insole member thereby forming a skeleton insole member having a central forepart opening defined by a perpendicular shoulder and, simultaneously with said dieing operation, compressing the margins of said central forward portion and thereby forming a beveled edge face at one side of said portion, securing said skeleton insole member upon one side of an imperforate sheet of insole material, cutting through said insole member inwardly of its edges and through said sheet by means of an insole-shaped die thereby providing a laminated insole having a forepart recess extending only part way there.- through, securing the unbeveled side of the portion died out from said insole member to the central forward portion of an outsole thereby providing upon said outsole a forepart projection substantially complemental to said insole recess but having an exposed beveled edge face for facilitating the fitting of said projection within the forepart recess of 'said' insole, and assembling said laminated insole together with said outsole in the manufacture of a shoe with said substantially complemental portions of said soles in interfitting relation.

PINCUS BRAUNER. 

